I mean, yeah, its a difficult situation to be in but they didn't follow the "chain of command". Per MPD training and policy, the first car on scene (Lane and Kueng) are in charge of it until a superior officer, like a sergeant arrives and all assisting cars defer to the first car. Now in real life, yeah that's maybe easier said than done but they should have known they were in charge of the scene.

All the officers on the scene were the same rank. Chauvin was the most senior officer but was not a superior officer. Chauvin was one of the FTO training officers for Kueng for a period of time while he and Lane were in field training, but that was months prior to the Floyd arrest.